My Engine is a HW3 (Eng no 253, Manufactured in 1969.
It is installed in mr Roberts 32' Ketch Motor Sailor.
I have the fuel tank above the engine and the fuel is fed by gravity only.
I turn off the fuel.  If the engine is not started for a period I need to bleed the 3 pumps to get full power to the engine.
If I dont bleed the pumps the engine will start but will not deliver full power.  Once I bleed the pump the full power of the engine is achieved.
Does any one in the forum have this issue, How can I solve the problem.?